Blower Motor Operates at High Speed Only. Chevrolet PJJ 2000

For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | With the mode selector in the ON position and the blower selector in the medium-3 position, test the blower switch output-high circuit at the blower resistor for continuity to ground. Refer to Circuit Testing in Wiring Systems. Is ground present? | -- | Go to Step 2 | Go to Step 3
2 | Test the blower switch output-high circuit at the blower motor for continuity to ground Refer to Circuit Testing in Wiring Systems. Is ground present? | -- | -- | Go to Step 4
3 | Replace the blower resistor Refer to Blower Motor Resistor Replacement . Is repair complete? | -- | System OK | --
4 | Repair the open in the blower switch output-high circuit. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | System OK | --